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proxmark3/client/comms.c

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//-----------------------------------------------------------------------------
// Copyright (C) 2009 Michael Gernoth <michael at gernoth.net>
// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// Code for communicating with the proxmark3 hardware.
//-----------------------------------------------------------------------------
#include "comms.h"
#include <inttypes.h>
#include <string.h>
#include <stdio.h>
#include "uart.h"
#include "ui.h"
#include "crc16.h"
#include "util_posix.h" // msclock
#include "util_darwin.h" // en/dis-ableNapp();
//#define COMMS_DEBUG
//#define COMMS_DEBUG_RAW
// Serial port that we are communicating with the PM3 on.
static serial_port sp = NULL;
communication_arg_t conn;
capabilities_t pm3_capabilities;
static pthread_t communication_thread;
static bool comm_thread_dead = false;
// Transmit buffer.
static PacketCommandOLD txBuffer;
static PacketCommandNGRaw txBufferNG;
size_t txBufferNGLen;
static bool txBuffer_pending = false;
static pthread_mutex_t txBufferMutex = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t txBufferSig = PTHREAD_COND_INITIALIZER;
// Used by PacketResponseReceived as a ring buffer for messages that are yet to be
// processed by a command handler (WaitForResponse{,Timeout})
static PacketResponseNG rxBuffer[CMD_BUFFER_SIZE];
// Points to the next empty position to write to
static int cmd_head = 0;
// Points to the position of the last unread command
static int cmd_tail = 0;
// to lock rxBuffer operations from different threads
static pthread_mutex_t rxBufferMutex = PTHREAD_MUTEX_INITIALIZER;
// Global start time for WaitForResponseTimeout & dl_it, so we can reset timeout when we get packets
// as sending lot of these packets can slow down things wuite a lot on slow links (e.g. hw status or lf read at 9600)
static uint64_t timeout_start_time;
static uint64_t last_packet_time;
static bool dl_it(uint8_t *dest, uint32_t bytes, uint32_t start_index, PacketResponseNG *response, size_t ms_timeout, bool show_warning, uint32_t rec_cmd);
// Simple alias to track usages linked to the Bootloader, these commands must not be migrated.
// - commands sent to enter bootloader mode as we might have to talk to old firmwares
// - commands sent to the bootloader as it only supports OLD frames (which will always be the case for old BL)
void SendCommandBL(uint64_t cmd, uint64_t arg0, uint64_t arg1, uint64_t arg2, void *data, size_t len) {
SendCommandOLD(cmd, arg0, arg1, arg2, data, len);
}
void SendCommandOLD(uint64_t cmd, uint64_t arg0, uint64_t arg1, uint64_t arg2, void *data, size_t len) {
PacketCommandOLD c = {CMD_UNKNOWN, {0, 0, 0}, {{0}}};
c.cmd = cmd;
c.arg[0] = arg0;
c.arg[1] = arg1;
c.arg[2] = arg2;
if (len && data)
memcpy(&c.d, data, len);
#ifdef COMMS_DEBUG
PrintAndLogEx(NORMAL, "Sending %s", "OLD");
#endif
#ifdef COMMS_DEBUG_RAW
print_hex_break((uint8_t *)&c.cmd, sizeof(c.cmd), 32);
print_hex_break((uint8_t *)&c.arg, sizeof(c.arg), 32);
print_hex_break((uint8_t *)&c.d, sizeof(c.d), 32);
#endif
if (!session.pm3_present) {
PrintAndLogEx(WARNING, "Sending bytes to Proxmark3 failed." _YELLOW_("offline"));
return;
}
pthread_mutex_lock(&txBufferMutex);
/**
This causes hangups at times, when the pm3 unit is unresponsive or disconnected. The main console thread is alive,
but comm thread just spins here. Not good.../holiman
**/
while (txBuffer_pending) {
// wait for communication thread to complete sending a previous commmand
pthread_cond_wait(&txBufferSig, &txBufferMutex);
}
txBuffer = c;
txBuffer_pending = true;
// tell communication thread that a new command can be send
pthread_cond_signal(&txBufferSig);
pthread_mutex_unlock(&txBufferMutex);
//__atomic_test_and_set(&txcmd_pending, __ATOMIC_SEQ_CST);
}
static void SendCommandNG_internal(uint16_t cmd, uint8_t *data, size_t len, bool ng) {
#ifdef COMMS_DEBUG
PrintAndLogEx(NORMAL, "Sending %s", ng ? "NG" : "MIX");
#endif
if (!session.pm3_present) {
PrintAndLogEx(NORMAL, "Sending bytes to proxmark failed - offline");
return;
}
if (len > PM3_CMD_DATA_SIZE) {
PrintAndLogEx(WARNING, "Sending %d bytes of payload is too much, abort", len);
return;
}
PacketCommandNGPostamble *tx_post = (PacketCommandNGPostamble *)((uint8_t *)&txBufferNG + sizeof(PacketCommandNGPreamble) + len);
pthread_mutex_lock(&txBufferMutex);
/**
This causes hangups at times, when the pm3 unit is unresponsive or disconnected. The main console thread is alive,
but comm thread just spins here. Not good.../holiman
**/
while (txBuffer_pending) {
// wait for communication thread to complete sending a previous commmand
pthread_cond_wait(&txBufferSig, &txBufferMutex);
}
txBufferNG.pre.magic = COMMANDNG_PREAMBLE_MAGIC;
txBufferNG.pre.ng = ng;
txBufferNG.pre.length = len;
txBufferNG.pre.cmd = cmd;
if (len > 0 && data)
memcpy(&txBufferNG.data, data, len);
if ((conn.send_via_fpc_usart && conn.send_with_crc_on_fpc) || ((!conn.send_via_fpc_usart) && conn.send_with_crc_on_usb)) {
uint8_t first, second;
compute_crc(CRC_14443_A, (uint8_t *)&txBufferNG, sizeof(PacketCommandNGPreamble) + len, &first, &second);
tx_post->crc = (first << 8) + second;
} else {
tx_post->crc = COMMANDNG_POSTAMBLE_MAGIC;
}
txBufferNGLen = sizeof(PacketCommandNGPreamble) + len + sizeof(PacketCommandNGPostamble);
#ifdef COMMS_DEBUG_RAW
print_hex_break((uint8_t *)&txBufferNG.pre, sizeof(PacketCommandNGPreamble), 32);
if (ng) {
print_hex_break((uint8_t *)&txBufferNG.data, len, 32);
} else {
print_hex_break((uint8_t *)&txBufferNG.data, 3 * sizeof(uint64_t), 32);
print_hex_break((uint8_t *)&txBufferNG.data + 3 * sizeof(uint64_t), len - 3 * sizeof(uint64_t), 32);
}
print_hex_break((uint8_t *)tx_post, sizeof(PacketCommandNGPostamble), 32);
#endif
txBuffer_pending = true;
// tell communication thread that a new command can be send
pthread_cond_signal(&txBufferSig);
pthread_mutex_unlock(&txBufferMutex);
//__atomic_test_and_set(&txcmd_pending, __ATOMIC_SEQ_CST);
}
void SendCommandNG(uint16_t cmd, uint8_t *data, size_t len) {
SendCommandNG_internal(cmd, data, len, true);
}
void SendCommandMIX(uint64_t cmd, uint64_t arg0, uint64_t arg1, uint64_t arg2, void *data, size_t len) {
uint64_t arg[3] = {arg0, arg1, arg2};
if (len > PM3_CMD_DATA_SIZE_MIX) {
PrintAndLogEx(WARNING, "Sending %d bytes of payload is too much for MIX frames, abort", len);
return;
}
uint8_t cmddata[PM3_CMD_DATA_SIZE];
memcpy(cmddata, arg, sizeof(arg));
if (len && data)
memcpy(cmddata + sizeof(arg), data, len);
SendCommandNG_internal(cmd, cmddata, len + sizeof(arg), false);
}
/**
* @brief This method should be called when sending a new command to the pm3. In case any old
* responses from previous commands are stored in the buffer, a call to this method should clear them.
* A better method could have been to have explicit command-ACKS, so we can know which ACK goes to which
* operation. Right now we'll just have to live with this.
*/
void clearCommandBuffer() {
//This is a very simple operation
pthread_mutex_lock(&rxBufferMutex);
cmd_tail = cmd_head;
pthread_mutex_unlock(&rxBufferMutex);
}
/**
* @brief storeCommand stores a USB command in a circular buffer
* @param UC
*/
static void storeReply(PacketResponseNG *packet) {
pthread_mutex_lock(&rxBufferMutex);
if ((cmd_head + 1) % CMD_BUFFER_SIZE == cmd_tail) {
//If these two are equal, we're about to overwrite in the
// circular buffer.
PrintAndLogEx(FAILED, "WARNING: Command buffer about to overwrite command! This needs to be fixed!");
fflush(stdout);
}
//Store the command at the 'head' location
PacketResponseNG *destination = &rxBuffer[cmd_head];
memcpy(destination, packet, sizeof(PacketResponseNG));
//increment head and wrap
cmd_head = (cmd_head + 1) % CMD_BUFFER_SIZE;
pthread_mutex_unlock(&rxBufferMutex);
}
/**
* @brief getCommand gets a command from an internal circular buffer.
* @param response location to write command
* @return 1 if response was returned, 0 if nothing has been received
*/
static int getReply(PacketResponseNG *packet) {
pthread_mutex_lock(&rxBufferMutex);
//If head == tail, there's nothing to read, or if we just got initialized
if (cmd_head == cmd_tail) {
pthread_mutex_unlock(&rxBufferMutex);
return 0;
}
//Pick out the next unread command
memcpy(packet, &rxBuffer[cmd_tail], sizeof(PacketResponseNG));
//Increment tail - this is a circular buffer, so modulo buffer size
cmd_tail = (cmd_tail + 1) % CMD_BUFFER_SIZE;
pthread_mutex_unlock(&rxBufferMutex);
return 1;
}
//-----------------------------------------------------------------------------
// Entry point into our code: called whenever we received a packet over USB
// that we weren't necessarily expecting, for example a debug print.
//-----------------------------------------------------------------------------
static void PacketResponseReceived(PacketResponseNG *packet) {
// we got a packet, reset WaitForResponseTimeout timeout
uint64_t prev_clk = __atomic_load_n(&last_packet_time, __ATOMIC_SEQ_CST);
uint64_t clk = msclock();
__atomic_store_n(&timeout_start_time, clk, __ATOMIC_SEQ_CST);
__atomic_store_n(&last_packet_time, clk, __ATOMIC_SEQ_CST);
(void) prev_clk;
// PrintAndLogEx(NORMAL, "[%07"PRIu64"] RECV %s magic %08x length %04x status %04x crc %04x cmd %04x",
// clk - prev_clk, packet->ng ? "NG" : "OLD", packet->magic, packet->length, packet->status, packet->crc, packet->cmd);
switch (packet->cmd) {
// First check if we are handling a debug message
case CMD_DEBUG_PRINT_STRING: {
char s[PM3_CMD_DATA_SIZE + 1];
memset(s, 0x00, sizeof(s));
size_t len;
uint16_t flag;
if (packet->ng) {
struct d {
uint16_t flag;
uint8_t buf[PM3_CMD_DATA_SIZE - sizeof(uint16_t)];
} PACKED;
struct d *data = (struct d *)&packet->data.asBytes;
len = packet->length - sizeof(data->flag);
flag = data->flag;
memcpy(s, data->buf, len);
} else {
len = MIN(packet->oldarg[0], PM3_CMD_DATA_SIZE);
flag = packet->oldarg[1];
memcpy(s, packet->data.asBytes, len);
}
if (flag & FLAG_LOG) {
PrintAndLogEx(NORMAL, "#db# %s", s);
} else {
if (flag & FLAG_INPLACE)
printf("\r");
printf("%s", s);
if (flag & FLAG_NEWLINE)
printf("\r\n");
}
fflush(stdout);
break;
}
case CMD_DEBUG_PRINT_INTEGERS: {
PrintAndLogEx(NORMAL, "#db# %" PRIx64 ", %" PRIx64 ", %" PRIx64 "", packet->oldarg[0], packet->oldarg[1], packet->oldarg[2]);
break;
}
// iceman: hw status - down the path on device, runs printusbspeed which starts sending a lot of
// CMD_DOWNLOAD_BIGBUF packages which is not dealt with. I wonder if simply ignoring them will
// work. lets try it.
default: {
storeReply(packet);
break;
}
}
}
// The communications thread.
// signals to main thread when a response is ready to process.
//
static void
#ifdef __has_attribute
#if __has_attribute(force_align_arg_pointer)
__attribute__((force_align_arg_pointer))
#endif
#endif
*uart_communication(void *targ) {
communication_arg_t *connection = (communication_arg_t *)targ;
uint32_t rxlen;
bool commfailed = false;
PacketResponseNG rx;
PacketResponseNGRaw rx_raw;
#if defined(__MACH__) && defined(__APPLE__)
disableAppNap("Proxmark3 polling UART");
#endif
// is this connection->run a cross thread call?
while (connection->run) {
rxlen = 0;
bool ACK_received = false;
bool error = false;
int res;
// Signal to main thread that communications seems off.
// main thread will kill and restart this thread.
if (commfailed) {
if (conn.last_command != CMD_HARDWARE_RESET) {
PrintAndLogEx(WARNING, "Communicating with Proxmark3 device " _RED_("failed"));
}
__atomic_test_and_set(&comm_thread_dead, __ATOMIC_SEQ_CST);
break;
}
res = uart_receive(sp, (uint8_t *)&rx_raw.pre, sizeof(PacketResponseNGPreamble), &rxlen);
if ((res == PM3_SUCCESS) && (rxlen == sizeof(PacketResponseNGPreamble))) {
rx.magic = rx_raw.pre.magic;
uint16_t length = rx_raw.pre.length;
rx.ng = rx_raw.pre.ng;
rx.status = rx_raw.pre.status;
rx.cmd = rx_raw.pre.cmd;
if (rx.magic == RESPONSENG_PREAMBLE_MAGIC) { // New style NG reply
if (length > PM3_CMD_DATA_SIZE) {
PrintAndLogEx(WARNING, "Received packet frame with incompatible length: 0x%04x", length);
error = true;
}
if ((!error) && (length > 0)) { // Get the variable length payload
res = uart_receive(sp, (uint8_t *)&rx_raw.data, length, &rxlen);
if ((res != PM3_SUCCESS) || (rxlen != length)) {
PrintAndLogEx(WARNING, "Received packet frame with variable part too short? %d/%d", rxlen, length);
error = true;
} else {
if (rx.ng) { // Received a valid NG frame
memcpy(&rx.data, &rx_raw.data, length);
rx.length = length;
if ((rx.cmd == conn.last_command) && (rx.status == PM3_SUCCESS)) {
ACK_received = true;
}
} else {
uint64_t arg[3];
if (length < sizeof(arg)) {
PrintAndLogEx(WARNING, "Received MIX packet frame with incompatible length: 0x%04x", length);
error = true;
}
if (!error) { // Received a valid MIX frame
memcpy(arg, &rx_raw.data, sizeof(arg));
rx.oldarg[0] = arg[0];
rx.oldarg[1] = arg[1];
rx.oldarg[2] = arg[2];
memcpy(&rx.data, ((uint8_t *)&rx_raw.data) + sizeof(arg), length - sizeof(arg));
rx.length = length - sizeof(arg);
if (rx.cmd == CMD_ACK) {
ACK_received = true;
}
}
}
}
}
if (!error) { // Get the postamble
res = uart_receive(sp, (uint8_t *)&rx_raw.foopost, sizeof(PacketResponseNGPostamble), &rxlen);
if ((res != PM3_SUCCESS) || (rxlen != sizeof(PacketResponseNGPostamble))) {
PrintAndLogEx(WARNING, "Received packet frame without postamble");
error = true;
}
}
if (!error) { // Check CRC, accept MAGIC as placeholder
rx.crc = rx_raw.foopost.crc;
if (rx.crc != RESPONSENG_POSTAMBLE_MAGIC) {
uint8_t first, second;
compute_crc(CRC_14443_A, (uint8_t *)&rx_raw, sizeof(PacketResponseNGPreamble) + length, &first, &second);
if ((first << 8) + second != rx.crc) {
PrintAndLogEx(WARNING, "Received packet frame with invalid CRC %02X%02X <> %04X", first, second, rx.crc);
error = true;
}
}
}
if (!error) { // Received a valid OLD frame
#ifdef COMMS_DEBUG
PrintAndLogEx(NORMAL, "Receiving %s:", rx.ng ? "NG" : "MIX");
#endif
#ifdef COMMS_DEBUG_RAW
print_hex_break((uint8_t *)&rx_raw.pre, sizeof(PacketResponseNGPreamble), 32);
print_hex_break((uint8_t *)&rx_raw.data, rx_raw.pre.length, 32);
print_hex_break((uint8_t *)&rx_raw.foopost, sizeof(PacketResponseNGPostamble), 32);
#endif
PacketResponseReceived(&rx);
}
} else { // Old style reply
PacketResponseOLD rx_old;
memcpy(&rx_old, &rx_raw.pre, sizeof(PacketResponseNGPreamble));
res = uart_receive(sp, ((uint8_t *)&rx_old) + sizeof(PacketResponseNGPreamble), sizeof(PacketResponseOLD) - sizeof(PacketResponseNGPreamble), &rxlen);
if ((res != PM3_SUCCESS) || (rxlen != sizeof(PacketResponseOLD) - sizeof(PacketResponseNGPreamble))) {
PrintAndLogEx(WARNING, "Received packet OLD frame with payload too short? %d/%d", rxlen, sizeof(PacketResponseOLD) - sizeof(PacketResponseNGPreamble));
error = true;
}
if (!error) {
#ifdef COMMS_DEBUG
PrintAndLogEx(NORMAL, "Receiving OLD:");
#endif
#ifdef COMMS_DEBUG_RAW
print_hex_break((uint8_t *)&rx_old.cmd, sizeof(rx_old.cmd), 32);
print_hex_break((uint8_t *)&rx_old.arg, sizeof(rx_old.arg), 32);
print_hex_break((uint8_t *)&rx_old.d, sizeof(rx_old.d), 32);
#endif
rx.ng = false;
rx.magic = 0;
rx.status = 0;
rx.crc = 0;
rx.cmd = rx_old.cmd;
rx.oldarg[0] = rx_old.arg[0];
rx.oldarg[1] = rx_old.arg[1];
rx.oldarg[2] = rx_old.arg[2];
rx.length = PM3_CMD_DATA_SIZE;
memcpy(&rx.data, &rx_old.d, rx.length);
PacketResponseReceived(&rx);
if (rx.cmd == CMD_ACK) {
ACK_received = true;
}
}
}
} else {
if (rxlen > 0) {
PrintAndLogEx(WARNING, "Received packet frame preamble too short: %d/%d", rxlen, sizeof(PacketResponseNGPreamble));
error = true;
}
if (res == PM3_ENOTTY) {
commfailed = true;
}
}
// TODO if error, shall we resync ?
pthread_mutex_lock(&txBufferMutex);
if (connection->block_after_ACK) {
// if we just received an ACK, wait here until a new command is to be transmitted
// This is only working on OLD frames, and only used by flasher and flashmem
if (ACK_received) {
#ifdef COMMS_DEBUG
PrintAndLogEx(NORMAL, "Received ACK, fast TX mode: ignoring other RX till TX");
#endif
while (!txBuffer_pending) {
pthread_cond_wait(&txBufferSig, &txBufferMutex);
}
}
}
if (txBuffer_pending) {
if (txBufferNGLen) { // NG packet
res = uart_send(sp, (uint8_t *) &txBufferNG, txBufferNGLen);
if (res == PM3_EIO) {
commfailed = true;
}
conn.last_command = txBufferNG.pre.cmd;
txBufferNGLen = 0;
} else {
res = uart_send(sp, (uint8_t *) &txBuffer, sizeof(PacketCommandOLD));
if (res == PM3_EIO) {
commfailed = true;
}
conn.last_command = txBuffer.cmd;
}
txBuffer_pending = false;
// main thread doesn't know send failed...
// tell main thread that txBuffer is empty
pthread_cond_signal(&txBufferSig);
}
pthread_mutex_unlock(&txBufferMutex);
}
// when thread dies, we close the serial port.
uart_close(sp);
sp = NULL;
#if defined(__MACH__) && defined(__APPLE__)
enableAppNap();
#endif
pthread_exit(NULL);
return NULL;
}
bool IsCommunicationThreadDead(void) {
bool ret = __atomic_load_n(&comm_thread_dead, __ATOMIC_SEQ_CST);
return ret;
}
bool OpenProxmark(void *port, bool wait_for_port, int timeout, bool flash_mode, uint32_t speed) {
char *portname = (char *)port;
if (!wait_for_port) {
PrintAndLogEx(INFO, "Using UART port " _YELLOW_("%s"), portname);
sp = uart_open(portname, speed);
} else {
PrintAndLogEx(SUCCESS, "Waiting for Proxmark3 to appear on " _YELLOW_("%s"), portname);
fflush(stdout);
int openCount = 0;
do {
sp = uart_open(portname, speed);
msleep(500);
printf(".");
fflush(stdout);
} while (++openCount < timeout && (sp == INVALID_SERIAL_PORT || sp == CLAIMED_SERIAL_PORT));
}
// check result of uart opening
if (sp == INVALID_SERIAL_PORT) {
PrintAndLogEx(WARNING, "\n" _RED_("ERROR:") "invalid serial port " _YELLOW_("%s"), portname);
sp = NULL;
return false;
} else if (sp == CLAIMED_SERIAL_PORT) {
PrintAndLogEx(WARNING, "\n" _RED_("ERROR:") "serial port " _YELLOW_("%s") " is claimed by another process", portname);
sp = NULL;
return false;
} else {
// start the communication thread
if (portname != (char *)conn.serial_port_name) {
uint16_t len = MIN(strlen(portname), FILE_PATH_SIZE - 1);
memset(conn.serial_port_name, 0, FILE_PATH_SIZE);
memcpy(conn.serial_port_name, portname, len);
}
conn.run = true;
conn.block_after_ACK = flash_mode;
// Flags to tell where to add CRC on sent replies
conn.send_with_crc_on_usb = false;
conn.send_with_crc_on_fpc = true;
// "Session" flag, to tell via which interface next msgs should be sent: USB or FPC USART
conn.send_via_fpc_usart = false;
pthread_create(&communication_thread, NULL, &uart_communication, &conn);
__atomic_clear(&comm_thread_dead, __ATOMIC_SEQ_CST);
session.pm3_present = true;
fflush(stdout);
return true;
}
}
// check if we can communicate with Pm3
int TestProxmark(void) {
PacketResponseNG resp;
uint16_t len = 32;
uint8_t data[len];
for (uint16_t i = 0; i < len; i++)
data[i] = i & 0xFF;
__atomic_store_n(&last_packet_time, msclock(), __ATOMIC_SEQ_CST);
clearCommandBuffer();
SendCommandNG(CMD_PING, data, len);
uint32_t timeout = 1000;
#ifdef USART_SLOW_LINK
// 10s timeout for slow FPC, e.g. over BT
// as this is the very first command sent to the pm3
// that initiates the BT connection
timeout = 10000;
#endif
if (WaitForResponseTimeoutW(CMD_PING, &resp, timeout, false) == 0) {
return PM3_ETIMEOUT;
}
bool error = false;
error = memcmp(data, resp.data.asBytes, len) != 0;
if (error)
return PM3_EIO;
SendCommandNG(CMD_CAPABILITIES, NULL, 0);
if (WaitForResponseTimeoutW(CMD_CAPABILITIES, &resp, 1000, false) == 0) {
return PM3_ETIMEOUT;
}
if ((resp.length != sizeof(pm3_capabilities)) || (resp.data.asBytes[0] != CAPABILITIES_VERSION)) {
PrintAndLogEx(ERR, _RED_("Capabilities structure version sent by Proxmark3 is not the same as the one used by the client!"));
PrintAndLogEx(ERR, _RED_("Please flash the Proxmark with the same version as the client."));
return PM3_EDEVNOTSUPP;
}
memcpy(&pm3_capabilities, resp.data.asBytes, MIN(sizeof(capabilities_t), resp.length));
conn.send_via_fpc_usart = pm3_capabilities.via_fpc;
conn.uart_speed = pm3_capabilities.baudrate;
PrintAndLogEx(INFO, "Communicating with PM3 over %s%s",
conn.send_via_fpc_usart ? _YELLOW_("FPC UART") : _YELLOW_("USB-CDC"),
memcmp(conn.serial_port_name, "tcp:", 4) == 0 ? "over " _YELLOW_("TCP") : "");
if (conn.send_via_fpc_usart) {
PrintAndLogEx(INFO, "PM3 UART serial baudrate: " _YELLOW_("%u") "\n", conn.uart_speed);
} else {
int res = uart_reconfigure_timeouts(UART_USB_CLIENT_RX_TIMEOUT_MS);
if (res != PM3_SUCCESS) {
return res;
}
}
return PM3_SUCCESS;
}
void CloseProxmark(void) {
conn.run = false;
#ifdef __BIONIC__
if (communication_thread != 0) {
pthread_join(communication_thread, NULL);
}
#else
pthread_join(communication_thread, NULL);
#endif
if (sp) {
uart_close(sp);
}
// Clean up our state
sp = NULL;
memset(&communication_thread, 0, sizeof(pthread_t));
session.pm3_present = false;
}
// Gives a rough estimate of the communication delay based on channel & baudrate
// Max communication delay is when sending largest frame and receiving largest frame
// Empirical measures on FTDI with physical cable:
// "hw pingng 512"
// usb -> 6..32ms
// 460800 -> 40..70ms
// 9600 -> 1100..1150ms
// ~ = 12000000 / USART_BAUD_RATE
// Let's take 2x (maybe we need more for BT link?)
static size_t communication_delay(void) {
if (conn.send_via_fpc_usart) // needed also for Windows USB USART??
return 2 * (12000000 / conn.uart_speed);
return 0;
}
/**
* @brief Waits for a certain response type. This method waits for a maximum of
* ms_timeout milliseconds for a specified response command.
* @param cmd command to wait for, or CMD_UNKNOWN to take any command.
* @param response struct to copy received command into.
* @param ms_timeout display message after 3 seconds
* @param show_warning display message after 3 seconds
* @return true if command was returned, otherwise false
*/
bool WaitForResponseTimeoutW(uint32_t cmd, PacketResponseNG *response, size_t ms_timeout, bool show_warning) {
PacketResponseNG resp;
if (response == NULL)
response = &resp;
// Add delay depending on the communication channel & speed
if (ms_timeout != (size_t) - 1)
ms_timeout += communication_delay();
__atomic_store_n(&timeout_start_time, msclock(), __ATOMIC_SEQ_CST);
// Wait until the command is received
while (true) {
while (getReply(response)) {
if (cmd == CMD_UNKNOWN || response->cmd == cmd) {
return true;
}
if (response->cmd == CMD_WTX && response->length == sizeof(uint16_t)) {
uint16_t wtx = response->data.asDwords[0] & 0xFFFF;
PrintAndLogEx(DEBUG, "Got Waiting Time eXtension request %i ms", wtx);
if (ms_timeout != (size_t) - 1)
ms_timeout += wtx;
}
}
uint64_t tmp_clk = __atomic_load_n(&timeout_start_time, __ATOMIC_SEQ_CST);
if ((ms_timeout != (size_t) -1) && (msclock() - tmp_clk > ms_timeout))
break;
if (msclock() - tmp_clk > 3000 && show_warning) {
// 3 seconds elapsed (but this doesn't mean the timeout was exceeded)
// PrintAndLogEx(INFO, "Waiting for a response from the Proxmark3...");
PrintAndLogEx(INFO, "You can cancel this operation by pressing the pm3 button");
show_warning = false;
}
// just to avoid CPU busy loop:
msleep(10);
}
return false;
}
bool WaitForResponseTimeout(uint32_t cmd, PacketResponseNG *response, size_t ms_timeout) {
return WaitForResponseTimeoutW(cmd, response, ms_timeout, true);
}
bool WaitForResponse(uint32_t cmd, PacketResponseNG *response) {
return WaitForResponseTimeoutW(cmd, response, -1, true);
}
/**
* Data transfer from Proxmark to client. This method times out after
* ms_timeout milliseconds.
* @brief GetFromDevice
* @param memtype Type of memory to download from proxmark
* @param dest Destination address for transfer
* @param bytes number of bytes to be transferred
* @param start_index offset into Proxmark3 BigBuf[]
* @param data used by SPIFFS to provide filename
* @param datalen used by SPIFFS to provide filename length
* @param response struct to copy last command (CMD_ACK) into
* @param ms_timeout timeout in milliseconds
* @param show_warning display message after 2 seconds
* @return true if command was returned, otherwise false
*/
bool GetFromDevice(DeviceMemType_t memtype, uint8_t *dest, uint32_t bytes, uint32_t start_index, uint8_t *data, uint32_t datalen, PacketResponseNG *response, size_t ms_timeout, bool show_warning) {
if (dest == NULL) return false;
if (bytes == 0) return true;
PacketResponseNG resp;
if (response == NULL)
response = &resp;
// clear
clearCommandBuffer();
switch (memtype) {
case BIG_BUF: {
SendCommandMIX(CMD_DOWNLOAD_BIGBUF, start_index, bytes, 0, NULL, 0);
return dl_it(dest, bytes, start_index, response, ms_timeout, show_warning, CMD_DOWNLOADED_BIGBUF);
}
case BIG_BUF_EML: {
SendCommandMIX(CMD_DOWNLOAD_EML_BIGBUF, start_index, bytes, 0, NULL, 0);
return dl_it(dest, bytes, start_index, response, ms_timeout, show_warning, CMD_DOWNLOADED_EML_BIGBUF);
}
case SPIFFS: {
SendCommandMIX(CMD_SPIFFS_DOWNLOAD, start_index, bytes, 0, data, datalen);
return dl_it(dest, bytes, start_index, response, ms_timeout, show_warning, CMD_SPIFFS_DOWNLOADED);
}
case FLASH_MEM: {
SendCommandMIX(CMD_FLASHMEM_DOWNLOAD, start_index, bytes, 0, NULL, 0);
return dl_it(dest, bytes, start_index, response, ms_timeout, show_warning, CMD_FLASHMEM_DOWNLOADED);
}
case SIM_MEM: {
//SendCommandMIX(CMD_DOWNLOAD_SIM_MEM, start_index, bytes, 0, NULL, 0);
//return dl_it(dest, bytes, start_index, response, ms_timeout, show_warning, CMD_DOWNLOADED_SIMMEM);
return false;
}
}
return false;
}
static bool dl_it(uint8_t *dest, uint32_t bytes, uint32_t start_index, PacketResponseNG *response, size_t ms_timeout, bool show_warning, uint32_t rec_cmd) {
uint32_t bytes_completed = 0;
__atomic_store_n(&timeout_start_time, msclock(), __ATOMIC_SEQ_CST);
// Add delay depending on the communication channel & speed
if (ms_timeout != (size_t) -1)
ms_timeout += communication_delay();
while (true) {
if (getReply(response)) {
// sample_buf is a array pointer, located in data.c
// arg0 = offset in transfer. Startindex of this chunk
// arg1 = length bytes to transfer
// arg2 = bigbuff tracelength (?)
if (response->cmd == rec_cmd) {
uint32_t offset = response->oldarg[0];
uint32_t copy_bytes = MIN(bytes - bytes_completed, response->oldarg[1]);
//uint32_t tracelen = response->oldarg[2];
// extended bounds check1. upper limit is PM3_CMD_DATA_SIZE
// shouldn't happen
copy_bytes = MIN(copy_bytes, PM3_CMD_DATA_SIZE);
// extended bounds check2.
if (offset + copy_bytes > bytes) {
PrintAndLogEx(FAILED, "ERROR: Out of bounds when downloading from device, offset %u | len %u | total len %u > buf_size %u", offset, copy_bytes, offset + copy_bytes, bytes);
break;
}
memcpy(dest + offset, response->data.asBytes, copy_bytes);
bytes_completed += copy_bytes;
} else if (response->cmd == CMD_ACK) {
return true;
} else if (response->cmd == CMD_WTX && response->length == sizeof(uint16_t)) {
uint16_t wtx = response->data.asDwords[0] & 0xFFFF;
PrintAndLogEx(DEBUG, "Got Waiting Time eXtension request %i ms", wtx);
if (ms_timeout != (size_t) - 1)
ms_timeout += wtx;
}
}
uint64_t tmp_clk = __atomic_load_n(&timeout_start_time, __ATOMIC_SEQ_CST);
if (msclock() - tmp_clk > ms_timeout) {
PrintAndLogEx(FAILED, "Timed out while trying to download data from device");
break;
}
if (msclock() - tmp_clk > 3000 && show_warning) {
// 3 seconds elapsed (but this doesn't mean the timeout was exceeded)
PrintAndLogEx(NORMAL, "Waiting for a response from the Proxmark3...");
PrintAndLogEx(NORMAL, "You can cancel this operation by pressing the pm3 button");
show_warning = false;
}
}
return false;
}
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